/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: wwy
 * Date: 2024-08-15
 * Time: 8:14
 */
public class run {
    public static void main(String[] args) {
        int year=2000;
        if((year%4==0&&year%100!=0)||year%400==0){
            System.out.println("run");
        }else{
            System.out.println("feirun");
        }
    }
}
